Select any of the following that are redox reactions.A.2SO2(g) + O2(g) → 2SO3(g)B.SO3(g) + H20(g) → H2SO4(1)C.2Cr(s) + 3CI2(g) → 2CrCl3(s)D.Ag20(s) + 2HCI(aq) → 2A9CI(s) + H2O(1)

The reactions in which the oxidation states of any element is changing will be redox reactions ( i.e…

Answered: Select any of the following that are…

Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter19: Redox Reactions

Section19.1: Oxidation And Reduction

Problem 10SSC

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Gold can be dissolved from gold-bearing rock by treating the rock with sodium cyanide in the presence of oxygen. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O() 4 NaAu(CN)2(aq) + 4 NaOH(aq) (a) Name the oxidizing and reducing agents in this reaction. What has been oxidized, and what has been reduced? (b) If you have exactly one metric ton (1 metric ton = 1000 kg) of gold-bearing rock, what volume of 0.075 M NaCN, in liters, do you need to extract the gold if the rock is 0.019% gold?
Consider four beakers. Beaker A has an aqueous solution of NaOH in which the OH- ions are represented by blue circles. Beaker B has a weak acid; HX is represented by red circles. Beaker C has a weak acid; H2X is represented by green circles. Beaker D has a weak acid; H3X is represented by yellow circles. X- ions are represented by triangles. Match the pictorial representations with the reactions given below. (a) HX(aq)+OH(aq) X(aq)+H2O(b) H2X(aq)+2OH(aq) X(aq)+2H2O(c) H3X(aq)+3OH(aq) X(aq)+3H2O
The Toliens test for the presence of reducing sugars (say, in a urine sample) involves treating the sample with silver ions in aqueous ammonia. The result is the formation of a silver mirror within the reaction vessel if a reducing sugar is present. Using glucose, C6H12O6, to illustrate this test, the oxidation-reduction reaction occurring is C6H12O6 (aq) + 2 Ag+(aq) + 2OH(aq) C6H12O7(aq) + 2 Ag(s) + H2O() What has been oxidized, and what has been reduced? What is the oxidizing agent, and what is the reducing agent? Tolien's test. The reaction of silver ions with a sugar such as glucose produces metallic silver. (a) The set-up for the reaction. (b) The silvered test tube
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The iron content of hemoglobin is determined by destroying the hemoglobin molecule and producing small water-soluble ions and molecules. The iron in the aqueous solution is reduced to iron(II) ion and then titrated against potassium permanganate. In the titration, iron(ll) is oxidized to iron(III) and permanganate is reduced to manganese(II) ion. A 5.00-g sample of hemoglobin requires 32.3 mL of a 0.002100 M solution of potassium permanganate. The reaction with permanganate ion is MnO4(aq)+8H+(aq)+5Fe2+(aq)Mn2+(aq)+5Fe3+(aq)+4H2O What is the mass percent of iron in hemoglobin?
ixing an aqueous solution of potassium nitrate with an aqueous solution of sodium chloride does not result in a chemical reaction. Why?
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Select any of the following that are redox reactions. A. 2SO2(g) + O2(g) → 2SO3(g) B. SO3(g) + H20(g) → H2SO4(1) C. 2Cr(s) + 3CI2(g) → 2CrCl3(s) D. Ag20(s) + 2HCI(aq) → 2A9CI(s) + H2O(1)